3550200421 has 2 divisors, whose sum is σ = 3550200422. Its totient is φ = 3550200420.

The previous prime is 3550200419. The next prime is 3550200461. The reversal of 3550200421 is 1240020553.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3289022500 + 261177921 = 57350^2 + 16161^2 .

It is a cyclic number.

It is not a de Polignac number, because 3550200421 - 2¹ = 3550200419 is a prime.

Together with 3550200419, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3550200392 and 3550200401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3550200461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1775100210 + 1775100211.

It is an arithmetic number, because the mean of its divisors is an integer number (1775100211).

Almost surely, 2^3550200421 is an apocalyptic number.

It is an amenable number.

3550200421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3550200421 is an equidigital number, since it uses as much as digits as its factorization.

3550200421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 3550200421 is about 59583.5583109972. The cubic root of 3550200421 is about 1525.5190093687.

Adding to 3550200421 its reverse (1240020553), we get a palindrome (4790220974).

The spelling of 3550200421 in words is "three billion, five hundred fifty million, two hundred thousand, four hundred twenty-one".